My teachers advise Chemistry as it will keep more doors open however I don't like Chemistry. But that's only because I don't like my teacher.
Take Physics for example, in Year 10 I hated it because of a teacher but in Year 11 we got a new teacher who was amazing. Very interesting lessons for Physics and really motivated me to do well and still is.

Physics is out of the question because even though I love the science in it I don't care for the math.

I do chemistry and it’s super hard but I love love love it, it’s my favourite of my 3 subjects. You have to bear in mind that you don’t have control over who your teachers and if you get a bad teacher again you’ll really struggle bc trust me chemistry requires some strong teaching whereas it’ll be easier to get through biology. But then again you should do what you enjoy regardless of the teacher and just put in the extra work and extra practise at your own end. Or you could take chemistry and swap it for biology after if you don’t get good teachers

(Original post by Oneiropólos)
My teachers advise Chemistry as it will keep more doors open however I don't like Chemistry. But that's only because I don't like my teacher.
Take Physics for example, in Year 10 I hated it because of a teacher but in Year 11 we got a new teacher who was amazing. Very interesting lessons for Physics and really motivated me to do well and still is.

Physics is out of the question because even though I love the science in it I don't care for the math.

My other two A-Levels would be Geography and psychology

1: depends what you want to do after school.
2. (maybe a biased opinion) chemistry seems more useful.
3. Biology is really easy (at least at higher) compared to chemistry but seemingly has more content you need to remember but a lot of it is pure logic, chemistry is more calculations and you need to learn it all (doesn't usually come naturally).
4. Biology is less math-y and more write-y compared to chemistry.

I personally would pick chemistry, mainly cause I like chemistry a lot more and it seems more useful. (from someone who takes physics, chemistry and biology.) Still up to you though.

I'm in my second year, still doing Chemistry however I dropped Biology at the end of the first year. The main reason was because I find Biology terribly boring but it also had way more content. Chemistry might be harder to understand but there's less to learn and there's also not really any application questions. However with Biology, at A Level it's literally all application and through my experience you have to be really on the ball as most of the questions aren't straightforward knowledge based, but require you thinking in a scientifically minded way...

Sooo to summarise I personally would choose Chemistry because at least once you know the facts, you don't really have to go through the difficulty of applying it like you do in Biology questions...